Molecular motion in ultrathin polystyrene films: Dynamic mechanical analysis of surface and interfacial effects

Kei Ichi Akabori, Keiji Tanaka, Toshihiko Nagamura, Atsushi Takahara, Tisato Kajiyama

研究成果: ジャーナルへの寄稿記事

60 引用 (Scopus)

抄録

Dynamic mechanical analysis was successfully used, for the first time, to characterize polymer thin and ultrathin films supported on substrates. This method allowed us to uncover the effects of the free surface and the substrate interface on the segmental dynamics in polystyrene (PS) films with various thicknesses. As the film thickness decreased, the distribution of relaxation times for the segmental motion became broader, a change mainly due to surface and interfacial effects. Interestingly, PS ultrathin films sandwiched with SiOx layers exhibited a relaxation process corresponding to the interfacial segmental motion in addition to that in the internal region of the films. The results obtained in this study imply that two contrasting effects exist: the effect of the free surface accelerates the segmental motion, whereas interfacial interactions produce the opposite effect.

元の言語英語
ページ(範囲)9735-9741
ページ数7
ジャーナルMacromolecules
38
発行部数23
DOI
出版物ステータス出版済み - 11 15 2005

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Polystyrenes
Dynamic mechanical analysis
Ultrathin films
Relaxation processes
Substrates
Polymer films
Relaxation time
Film thickness
Thin films

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

これを引用

Molecular motion in ultrathin polystyrene films : Dynamic mechanical analysis of surface and interfacial effects. / Akabori, Kei Ichi; Tanaka, Keiji; Nagamura, Toshihiko; Takahara, Atsushi; Kajiyama, Tisato.

:: Macromolecules, 巻 38, 番号 23, 15.11.2005, p. 9735-9741.

研究成果: ジャーナルへの寄稿記事

Akabori, Kei Ichi ; Tanaka, Keiji ; Nagamura, Toshihiko ; Takahara, Atsushi ; Kajiyama, Tisato. / Molecular motion in ultrathin polystyrene films : Dynamic mechanical analysis of surface and interfacial effects. :: Macromolecules. 2005 ; 巻 38, 番号 23. pp. 9735-9741.
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